Light moves in a straight line and very fast. White light from the sun is a mixture of colors that makes up the visible spectrum, including red, orange, yellow, green, blue, indigo and violet. When light hits an object that it cannot pass through, it forms a shadow on the opposite side from the light source. Objects can be transparent and allow light to pass through, translucent where light is diffused, or opaque where no light passes through. Natural luminous bodies like the sun produce their own light, while artificial luminous bodies require an external power source to produce light. Heat transfers from warmer to cooler bodies through conduction.

1. UNIT: 9 LIGHT
Bodies, light and heat
By:
Carmen Vispo Welzenbach
Angela Martinez Ros

2. 1. LIGHT
 We need light to see:
 Light moves in a straight line.
 Light moves very fast.

3. 2. LIGHT AND SHADOWS
 When light cannot travel through an object,a shadow is
formed.
 The shadow of an object is always formed in the
opposite side to the source of light

4. 3. COLOURS
 The light we get from the sun is called white light
 White light is a mixture of seven colours:
red,orange,yellow,green,blue,indigo and violet
 The primary colours are: blue red and yellow

5. MIXTURE
 Three mixtures of the primary colours
Y + B = G
R + B = V
Y + R = O

6. 1.BODIES AND LIGHT
 Transparent,translucent and opaque objects
 Luminous and non-luminous bodies
 Natural luminous bodies
 Artificial luminous bodies

7. 2.OBJECTS
Transparent
Translucent
Opaque

8. 1.LUMINOUS AND NON-LUMINOUS BODIES
1) Natural luminous bodies, like the sun produce light
2) Artificial luminous bodies like candle,are man-
made
3) Some objects are sources of light. We call them
luminous bodies.
4) Non-luminous bodies produce no light

9. 1.HEAT
 Heat goes from one body to another
 Conductors and insulators

10. 2.HEAT GOES FROM ONE
BODY TO ANOTHER
 Heat goes from hot bodies to colder bodies
Games
I. Light moves in a curved / straight line
II. Light moves very fast / very slowly

11. 3.CONDUCTORS AND INSULATORS
 Conductors (iron, aluminium and glass)
 Insulators (wood and plastic)

12. 4.VOCABULARY
 Artificial : artificial
 Conductor: conductor
 Fast: rápido
 Heat: calor
 Insulator: aislante
 Light: luz
 Luminous: luminoso
 Natural: natural
 Prism: prisma
 Shadow: sombra
 Straight line: línea recta
 Translucent: translúcido
 Transparent: transparente
 White light: luz blanca

13. THE END